Abstract
Marine renewable energy, including tidal renewable energy, is one of the less exploited sources of energy that could contribute to energy demand, while reducing greenhouse gas emissions. Amongst several proposals to build tidal range structure (TRS), a tidal lagoon has been proposed for construction in Swansea Bay, in the South West of the UK, but this scheme was recently rejected by the UK government due to the high electricity costs. This decision makes the optimisation of such schemes more important for the future. This study proposes various novel approaches by breaking the operation into small components to optimise the operation of TRS using a widely used 0-D modelling methodology. The approach results in a minimum 10% increase in energy output, without the inclusion of pumping, in comparison to the maximum energy output using a similar operation for all tides. This increase in energy will be approximately 25% more when pumping is included. The optimised operation schemes are used to simulate the lagoon operation using a 2-D model and the differences between the results are highlighted.
Highlights
With improvements in environmental awareness globally, emission levels of CO2 are expected to decrease by reducing reliance on fossil fuels, and further development in renewable energy.The UK government aims to produce 15% of its total energy from renewable resources by 2020, which corresponds to approximately 35% of the UK’s electricity demand [1,2,3]
The efficiency of turbines and pumps efficiency might be different before/after generating/sluicing phases, the primary direction of half of the turbines in the ebb direction and the other half in the flood direction have been considered. This is a very common approach adopted in the industry as confirmed through a certain number of studies published in the far-field modelling [18,24,27,32]
Various schemes have been proposed to optimise the operation of tidal range structure (TRS) using a widely used 0-D modelling methodology and applied to the proposed Swansea Bay Lagoon
Summary
With improvements in environmental awareness globally, emission levels of CO2 are expected to decrease by reducing reliance on fossil fuels, and further development in renewable energy. They optimised driving heads based on the size and number of (electricity) generation in relation to varying trends in energy demand [13] They optimised driving turbines, which withand the number barrage and/or lagoonwhich dimensions. Yates et al used an unlimited pumping head and constant generating head to study the influence of turbining and pumping efficiencies in a 0-D model [20] They found that the overall energy could improve by about. Flexible implemented with variableuntil operational and optimised using various turbines operation in order towas generate energy and continues the headheads difference across the impoundment combination of tides and utilising a model. When the head difference is smaller than ending head, namely Hef , the sluice gates are again opened to raise the water levels inside the impoundment
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
